Fiat Chrysler Automobiles is recalling almost half a million medium- and heavy-duty Ram trucks over a water pump issue that could potentially cause a fire.

The company said it is not aware of any injuries or accidents related to the issue, which affects 2013-17 Ram 2500 and 3500 pickups and 3500, 4500 and 5500 chassis cabs. The recall is limited to trucks with 6.7-liter engines, the company said in a news release, noting that it no longer equips vehicles with that water pump.

"Customer feedback prompted an FCA US investigation that discovered certain trucks are equipped with a water-pump bearing that, after exposure to certain conditions, may overheat and potentially cause an engine-compartment fire," the release said. "Compromised water-pump function may activate a warning light in an affected vehicle’s instrument cluster. Customers are urged to consult their dealers whenever they observe warning lights."

The scope of any potential fire is apparently wide. A company spokesman said that "in accordance with (the) regulatory definition, which includes everything from a burning odor to open flame, we are aware of a small number of such incidents. Of these, a smaller number involved damage – none of which extended beyond the immediate area of the water pump."